A powder room is small, so the wall color sets the whole mood, and Warm Taupe is a forgiving place to start. It is a soft, sandy neutral that feels warm without going dark, so even a windowless half bath ends up cozy rather than cramped. In a room you mostly see by lamplight, that gentle, grounded tone flatters everyone who walks in.
To keep it from feeling heavy, pair the walls with Soft White on the trim, casing, and ceiling for a quiet, creamy frame that lets the taupe breathe. Then bring in Pale Oak, a honeyed, slightly golden tone, as a small accent on the vanity or a single detail. Walls in the taupe, trim in the soft white, and just a touch of the warm oak where you want the eye to land.